The Beginner's Guide to Capacitive Switches
Switches are the foundation on which nearly all electrical devices operate. From complex computers to lamp and appliance buttons, most electrical devices contain switches. Some switches, however, rely on capacitive sensing to function. Known as capacitive switches, they offer an attractive alternative to mechanical switches. For a better understanding of capacitive switches and how they work, keep reading
What Is a Capacitive Switch?
A capacitive switch is a type of electrical switch that responds to touch with a conductive object. Like all other switches, including mechanical switches, they feature a circuit that alternates between an open and closed state. Switches change between an open and closed state in response to user input. Capacitive switches require a physical touch with a conductive object to alternate from an open state to a closed state or vice versa.
How Capacitive Switches Work
While capacitive switches may sound complex, they work in a very simple manner. They create a uniform static electric field while constantly measuring it for changes. If a conductive object touches a capacitive switch, the switch's capacitance will change. Therefore, the capacitive switch will respond by opening or closing the circuit.
